This is a quite complicated applet/servlet combination to interactively animate almost any Java application or algorithm. The basic idea is to animate user's code interactively. First You write the code, send it to the server and wait a while. Then You can watch Your own code in action. The system is able to animate almost any algorithm written in Java, exact details of the restictions can be found in the user's manual. Major features: user's own code (with or without errors :), interactive, line-by-line